It says, “CLUB ACCESS” along the side of my cards, so I would say it’s still a visual check.
My friend who has Bucs cards tells me they don’t have to check tickets when going from the stands into the club because they have much better security at the bottom of the club sections. So really only those that could be club seat holders would be in that area and go through the door.
As you know, nothing stops anyone from coming into the club sections at Bulls games, and there has to be a way to allow those that donate the right amount but choose to sit in “non-club” sections to get in.